Tower fan



FIG. 1 is a right side front perspective view of a tower fan showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a side elevation view thereof, the opposite side being a mirror image of that shown;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a top plan view thereof.

The broken line showing of environmental structure in FIG. 1-6 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a tower fan, as shown and described. 